It's easy to explain blue, basically, Gin did the same thing to Aizen, that Aizen did to the rest of the Gotei 13.

From the start Aizen had his crazy plan, he recruited Gin, not knowing that Gin want him dead for what he did to Matsumoto.

Along the way this "Bankai Database" bollocks came up, Aizen and Gin get together and a plan is formed

Aizen: Okay that mug Kuro wants to log our Bankai's in his Database, but I'm going to use my Shikai to throw a spanner in the works, so that we can get the drop on them when we go evil and ruin up the joint (because apprently in the past Aizen spoke like a 1950's new york mobster), What should I tell him for you?
Gin: Good idea boss, well tell him my bankai is super long and super fast when really *gets on his troll face* it err.... makes great cheese on toast... yeah....

On the whole Reiatsu sponge thing.... Yeah that's actually an even better idea than the Peter Petrelli empath thing, would also go back and explain the very first question of the series, namely HOW Ichigo managed to totally drain Rukia, when he was only supposed to take enough power to kill that hollow.

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As I expected, the chubby lady was Hyorin's captain, damn, she got FAT. xD I love that! Hehe, I love Hiraku's and Ichigo's reaction when they saw their introduction.

So, the guy with the big hair is a medic, like Unohana, I like that.

The other chick is a scientist, like Kurostsuchi, and they know each other, hmm, very interesting!

And the beard guy and the fat lady, we still don't know much about them, I think, I atleast didn't understand what they do or their expertise, we'll see!

As for taking Rukia, Byakuya and Renji with them, hm, I wonder what ability they were talking about to restorer them, even Zangetsu is with them.

Apparently, Unohana knows what it is, that it's bad and will probably change them. Thing is, why would she react like that? Doesn't she want them to be saved? I mean, if it's something that bad, meh, I don't know, but it's weird that they were interested in all of them, one is a captain(okay I guess this one is kinda important) and the other two are lieutenants, still... I wonder why.

As for Zangetsu, how the hell are they going to restore him to be like he was? Well, if they are going to restore him, I doubt it'll be the same Zangetsu, and I'm also betting the other 3 won't be the same too, dunno.

I am also a bit surprised, okay, maybe not, to why they want Ichigo to go to the palace. One thing is for sure, we'll be seeing the Soul King and Ichigo is going to speak to him/her/it!

Squad 0 also seems to be very powerful. That scientist chick managed to get Rukia, Byakuya and Renji, break into Kurotsuchi's lab to get Zangetsu, all when the others were talking. That seems pretty fucking fast to me! MONSTER!

As I expected, the chubby lady was Hyorin's captain, damn, she got FAT. xD I love that! Hehe, I love Hiraku's and Ichigo's reaction when they saw their introduction.

So, the guy with the big hair is a medic, like Unohana, I like that.

The other chick is a scientist, like Kurostsuchi, and they know each other, hmm, very interesting!

And the beard guy and the fat lady, we still don't know much about them, I think, I atleast didn't understand what they do or their expertise, we'll see!

As for taking Rukia, Byakuya and Renji with them, hm, I wonder what ability they were talking about to restorer them, even Zangetsu is with them.

Apparently, Unohana knows what it is, that it's bad and will probably change them. Thing is, why would she react like that? Doesn't she want them to be saved? I mean, if it's something that bad, meh, I don't know, but it's weird that they were interested in all of them, one is a captain(okay I guess this one is kinda important) and the other two are lieutenants, still... I wonder why.

As for Zangetsu, how the hell are they going to restore him to be like he was? Well, if they are going to restore him, I doubt it'll be the same Zangetsu, and I'm also betting the other 3 won't be the same too, dunno.

I am also a bit surprised, okay, maybe not, to why they want Ichigo to go to the palace. One thing is for sure, we'll be seeing the Soul King and Ichigo is going to speak to him/her/it!

Squad 0 also seems to be very powerful. That scientist chick managed to get Rukia, Byakuya and Renji, break into Kurotsuchi's lab to get Zangetsu, all when the others were talking. That seems pretty fucking fast to me! MONSTER!

I love this chapter, to much stuff!

Unohana, if you haven't caught on yet, have been very hinted at not enjoying combat or slaying foes.

However, if you've also noticed, aside from Yama she is the most feared Captain in the Gotei.

Big Hair's comment was implying she'll be leading the Gotei now, she'll lead them in rebuilding, and she'll lead them in their counter attack against Juha.